🛠️ Invention or technique

MIME (Multipurpose Internet Mail Extensions)

Date
1992 · confidence medium
Place
Carnegie Mellon University, Pittsburgh, Pennsylvania, United States
Credited to
Nathaniel Borenstein
Field
Communication

What it is

Building on Carnegie Mellon's Andrew Messaging System, Borenstein designed MIME as a cross-platform alternative that let email messages include different character sets and multimedia attachments. Formalized in several RFCs, its content-type specifications were later adopted by the HTTP protocol for the web.

The exact year of introduction is not clearly confirmed by the source consulted; the first MIME RFC (1341) dates from 1992.

What it led to

  • Multimedia attachments and non-English characters in email
  • Adoption of MIME content types by HTTP and the web
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Sources✓ verified 2026-09-28